Friction-clutch.



G. HANSEN.

' FRICTION CLUTCFL APPLICATION FILED JUNE 6,1914.

atented Nov. 3, 1914.

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Specification of Letters Patent.

Patented Nov. 3, 191a.

Appllcatien filed June 6. 1914. Serial no. 343,339.

To all whom it may concern:

Be it known that I, Gmrrono- Hansen, a

citizen of the United States, residing at Tifiin, in the county of Seneca and State of Ohio, have invented a new and useful 1m provement in Friction Clutches, of which the following is a specification.

My invention relates to an improvement in friction-clutches for use in transmitting I to power.

In the accompanyin drawings, Figure 1 is asection on line 1, 1g. 3, of my improved friction -clutch in its unshipped condition and in operative position on a driving shaft and a. driven shaft, shown broken away; Fig. 2 is a similar view showin'glthe clutch in its shipped. condition; Fig. 3 is section on line 3, Fig. 1, and Fig. a: is a section on line t, 1.

A circular head 5, keyed at its hub to a drive-shaft 6, has pinned to it a cylinder 7.

shaft (i to the drive-shaft, the oollargq is This cylinder is lined with material 8, pref erably compressed aper, to afi'ord a friction surface against w ich a split ring 9, of spring steel, forming the outer expansible clutch-mernber, is to be pressed as hereinafter described. The inner face of the ring presents beveled surfaces, as shown at and 11, converging V-like in cross-section toward the circumferential center of the ring. An inner annular clutch-member 12 {has a sleeve 13 keyed to a driven shaft 6 land a circumferential web terminating in a head 14 conforming on its outer surface to the ring-surface 11' to operate wedgingly against the latter. A companion clutchmember 15, shown in the form. of ahollow annulus, surrounds the sleeve 13' and is movable longitudinally thereon; and the outer circumferential surface of its head 16 conforms to the ring-surface 10. Between the members 12 and may be interposed a spi al spring 17 tending to force apart these mem were and overcome any binding or sticking tendency thereof when released, as hereinafter explained, for unshipping the clutch; though 'the spring is a minor feature and may be entirely dispensed with. The outer end of the sleeve 13 is threaded and carries adjustably an abutment-nut l8, fastened in adjusted position by a set screw 19 and having a concaved inner face. A circumferentially recessed'collar 20 is sup orted on the driven shaft 6* to be shifted a ong it, and is adapted to have a lever (not shown) applied the open end of the cylinder.

against the nut, with the result of to it in the recess, for shifting the collar. At

- intervals about the outer face of the clutchinemher 15, ears 21 project in airs through ach pair has pivotally connected with it the inner end of one link of a two-link toggle-22 provided with a cam-like tooth 23 engaging 'the 'concave face of the-nut. This link is pivotally connected at its outer end with the adjacent end of the other toggle-link, which is ivoted at its opposite end between ears 24 pro jecting from the inner face of the collar 20. Each member 12 and 15 contains a transverse groove in its outer beveled face, and a key 25, of. the contour shown, projects into these grooves and between the ends of the split expansion-ring toinsure rotatiouof the latter with the adjacent clutch-members and prevent slipping of the latter against thering. Y

To operate the clutch for couplin the shifted from its position in Fi 1 "to. that shown in Fig. 2, therebv hen mg the till gles and shortening the distance bet-ween t] e centers wand 03', and forcing the tooth'23 ulling outwardly the clutch-member 12 and aming" inwardly the clutch-member l5 and the efiect of wedging the beveled surfaces of these members against the opposing surfaces 10 and 11 of the ring to expand it into frictional contact with the linin 8 and thus clutch the shafts togethen. hiftin 'the collar in the opposite direction straihtens the toggles into the condition of that shown in Fig. l with resultant separation of the members 12' and 15 to unship the clutch.

Any' wear betweenthe engaging surfaces of the nut and the tooth may be readily compensated for, by adjusting the nut toward the tooth.

a friction-clutch the combination of a cylinder provided with an inner frictionsurface, an expansionering in the cylinder having its inner "surface beveled to converge toward its circumferential center, clutchmembers within said ring having a key-connection therewith between its ends and provided with beveled outer surfaces to engage, respectively, said beveled ring-surfaces, and

toggle-mechanism for simultaneously mov ing said clutch-members inrelatively opposite directions for expanding said ring against said frictioneurface,

3; In a friction-clutch, the combination of acylinder provided with an inner friction-surface, an expansion-ring in the cylinder having its inner surface beveled to converge toward its circumferential center, clutch-members within said ring provided with beveled outer surfaces to engage, re spectively, with said beveled ring-surfaces, an abutment connected with the inner clutch-member, a collar, and a toggle connecting said collanand the outer clutchmember and provided on the inner end of one of its links with a tooth coiiperating with said I abutment.

4-. In a friction-clutch, the combination of a cylinder provided with an inner frictionsurface, an expansion-ring in the cylinder having its inner surface beveled to converge toward its circumferential center, inner and outer clutch-members within said ring pros ded with beveled outer surfaces to engage, respectively, with said beveled ring-surfaces, a sleeve carrying the nner clutch-member, a nut adgustably supported on said sleeve, 2t.COlltI, and toggles connecting said collar and the outer clutch-member and provided on the ends of their inner links with teeth coliperating with the inner face of the nut.

I 5. In a friction-clutch, the combination of a cylinder provided with an inner frictionsurface, an expansion-ring in the cylinder having itsinner surface beveled to converge toward its circumferential center, inner and outer clutch-members within said ring provided with beveled outer surfaces to engage, respectively, with said beveled ring-surfaces, athreaded sleeve carrying the inner clutchmember, a nut on said sleeve having a concave inner surface, a collar, and toggles connecting said collar and the outer clutch' 

